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Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data

2017-03-27Journal article Open access
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dc.contributor.authorATLAS collaboration (2852 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOleiro Seabra, Luis Filipe
dc.contributor.authorOnofre, António
dc.contributor.authorPedro, Rute
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T11:53:39Z
dc.date.available2019-02-04T11:53:39Z
dc.date.issued2017-03-27
dc.date.updated2019-02-04T11:53:39Z
dc.description.abstractThis paper describes the algorithms for the reconstruction and identification of electrons in the central region of the ATLAS detector at the Large Hadron Collider (LHC). These algorithms were used for all ATLAS results with electrons in the final state that are based on the 2012 pp collision data produced by the LHC at $\sqrt{\mathrm {s}}$ = 8  $\text {TeV}$ . The efficiency of these algorithms, together with the charge misidentification rate, is measured in data and evaluated in simulated samples using electrons from $Z\rightarrow ee$ , $Z\rightarrow ee\gamma $ and $J/\psi \rightarrow ee$ decays. For these efficiency measurements, the full recorded data set, corresponding to an integrated luminosity of 20.3 fb$^{-1}$ , is used. Based on a new reconstruction algorithm used in 2012, the electron reconstruction efficiency is 97% for electrons with $E_{\mathrm {T}}=15$   $\text {GeV}$ and 99% at $E_{\mathrm {T}}= 50$   $\text {GeV}$ . Combining this with the efficiency of additional selection criteria to reject electrons from background processes or misidentified hadrons, the efficiency to reconstruct and identify electrons at the ATLAS experiment varies from 65 to 95%, depending on the transverse momentum of the electron and background rejection.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C77 (2017) 195 Eur. Phys. J. C (2017) 77:195; DOI 10.1140/epjc/s10052-017-4756-2
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-017-4756-2
dc.identifier.urihttp://hdl.handle.net/10400.26/27248
dc.language.isoeng
dc.titleElectron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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